The fire extinguisher on a commercial vehicle must be rated at least 5 B:C. The B rating covers flammable liquid fires and the C rating covers electrical fires. The extinguisher must also be securely mounted, easily accessible, and fully charged.
The CDL (Commercial Driver License) exam tests your knowledge of commercial driving rules, safety procedures, and vehicle operation. You must score 80% or higher to pass the written knowledge test. The exam covers general knowledge, air brakes, combination vehicles, and various endorsements.
This question is from the Class A CDL Knowledge Test #2 section. Practice with more questions from this category to build confidence before taking the official DMV test.
Browse All Free CDL Practice Tests →